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  1. #include<iostream>
  2. #include<vector>
  3. #include<algorithm>
  4. #include<iterator>
  5. typedef std::vector<double> dvector;
  6. dvector getArray () {
  7.     size_t n;
  8.     std::cin >> n;
  9.     dvector v(n);
  10.     for (size_t i=0; i != v.size(); ++i){
  11.         std::cin >> v[i];
  12.     }
  13.     return v;
  14. }
  15. dvector operator*(const dvector& a, const dvector& b) {
  16.   dvector result(a.size()+b.size());
  17.   for (size_t i=0; i < a.size(); ++i){
  18.     for (size_t j=0; j < b.size(); ++j){
  19.      result[i+j] += a[i]*b[j];
  20.     }
  21.   }
  22.   return result;
  23. }
  24. int main () {
  25.     dvector a = getArray();
  26.     dvector b = getArray();
  27.     dvector result = a*b;
  28.     std::ostream_iterator<double> out (std::cout, " ");
  29.     std::copy (result.begin(), result.end(), out);
  30. }
Success #stdin #stdout 0s 3476KB
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https://ideone.com/SuXpH9
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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